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Use interim tiles when changing dynamic parameters

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This commit is contained in:
Éric Lemoine
2015-11-06 16:50:57 +01:00
parent 9cf26f1fac
commit 132861e175
10 changed files with 222 additions and 31 deletions
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26
src/ol/renderer/canvas/canvastilelayerrenderer.js
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@@ -316,19 +316,29 @@ ol.renderer.canvas.TileLayer.prototype.prepareFrame =
var tmpExtent = ol.extent.createEmpty();
var tmpTileRange = new ol.TileRange(0, 0, 0, 0);
var childTileRange, fullyLoaded, tile, tileState, x, y;
var childTileRange, fullyLoaded, tile, x, y;
var drawableTile = (
/**
* @param {!ol.Tile} tile Tile.
* @return {boolean} Tile is selected.
*/
function(tile) {
var tileState = tile.getState();
return tileState == ol.TileState.LOADED ||
tileState == ol.TileState.EMPTY ||
tileState == ol.TileState.ERROR && !useInterimTilesOnError;
});
for (x = tileRange.minX; x <= tileRange.maxX; ++x) {
for (y = tileRange.minY; y <= tileRange.maxY; ++y) {
tile = tileSource.getTile(z, x, y, pixelRatio, projection);
tileState = tile.getState();
if (tileState == ol.TileState.LOADED ||
tileState == ol.TileState.EMPTY ||
(tileState == ol.TileState.ERROR && !useInterimTilesOnError)) {
if (!drawableTile(tile) && tile.interimTile) {
tile = tile.interimTile;
}
goog.asserts.assert(tile);
if (drawableTile(tile)) {
tilesToDrawByZ[z][ol.tilecoord.toString(tile.tileCoord)] = tile;
continue;
}
fullyLoaded = tileGrid.forEachTileCoordParentTileRange(
tile.tileCoord, findLoadedTiles, null, tmpTileRange, tmpExtent);
if (!fullyLoaded) {
@@ -360,7 +370,7 @@ ol.renderer.canvas.TileLayer.prototype.prepareFrame =
var origin = ol.extent.getTopLeft(tileGrid.getTileCoordExtent(
[z, canvasTileRange.minX, canvasTileRange.maxY],
tmpExtent));
var currentZ, index, scale, tileCoordKey, tileExtent, tilesToDraw;
var currentZ, index, scale, tileCoordKey, tileExtent, tileState, tilesToDraw;
var ix, iy, interimTileRange, maxX, maxY;
var height, width;
for (i = 0, ii = zs.length; i < ii; ++i) {